Arithmetic in Cell Arrays
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I have the following variables in Cell arrays. b_x{k}, x{k}, c{k}.
I want to perform the following operation within the cell array.
D{k} = sqrt((b{k} - x{k}).^2 + (c{k}).^2)
When doing this I realize that these arithmetic operations cannot be done through a cell array. So do I have to do it using generalized operations such as gadd, gsubtract etc? If yes then for the element wise square should I use 'gmultiply' twice? Is there no other way?
Thanks
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Walter Roberson
2013-11-11
D = cellfun( @(B, X, C) sqrt((B - X).^2 + C.^2), b, c, x);
2 个评论
CX
2013-11-11
Walter Roberson
2013-11-12
Your b, c, and x are your cell arrays. cellfun is going to step through corresponding locations in the cell arrays, b{5} with c{5}, x{5} for example, and pass those values as arguments to the anonymous function of three arguments @(B, X, C) sqrt((B - X).^2 + C.^2) . The B and X and C received in the anonymous functions are specific values extracted from the cell array, rather than the cell arrays as a whole. If I had used the variable names b, x, and c within the anonymous function, you would have gotten confused between the cell arrays as a whole and individual values extracted from the arrays.
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Image Analyst
2013-11-11
0 个投票
Try using cell2mat(), or just avoid using cell arrays and use numerical arrays in the first place. Why do you need cell arrays? Are you storing mixed data, such as numbers with an associated string?
3 个评论
CX
2013-11-11
Image Analyst
2013-11-11
That is not a reason for using cell arrays. You can use regular arrays for b, x, and c, though if they have different lengths in each folder then D will have to be a cell array. Please give an example of them for two different folders.
CX
2013-11-11
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